Main contact system for circuit breakers fixed mounted and withdrawable, Frame Size 1, 3-pole, for 3WA2 breaking capacity class N, In = 1600A, for 3WA2 breaking capacity class S, In = 800-1600A, for 3WA3 breaking capacity class N, In = 1600A, for 3WA3 breaking capacity class S, In = 800-1600A, 3 pieces